void raw_file_open_test()
{
  TFile *file = TFile::Open("./testfile.txt?filetype=raw", "READ");

  Int_t size = file->GetSize();
  Printf("size = %d\n", size);

  char *buf = new Char_t[size];
  memset(buf, '\0', size);

  file->Seek(0);  
  file->ReadBuffer(buf, size);

  Printf("\"%s\"", buf);
  
  free(buf);

  return;
}